This car, the first RHD prototype the company made, is pretty unique, even going by how rare the right handers normally are. The VIN plate suggests it's an extremely early car (#510, with the cars starting at #500), and the underbody as well as various other details suggest this is actually Pilot Car #10. To put that into some kind of context, first there were the 2 1977/78 prototype cars and then there were 25 pilot cars, which were the new shape, with the new mechanicals - so, essentially a run of prototypes before building the 8,500 production cars.
This pilot car was kept by the factory and then sent to a company on the UK Mainland called Wooler Holdec to be converted to right hand drive as a tester for releasing a UK specific model DeLorean. This car was then returned to the factory, and, going by the parts it had when it came into the current owner's possession, was stripped down at least once to provide parts for other production cars.
After the factory went into receivership in 1982, cars were hand assembled by a skeleton crew to make as much money for the receivers as possible until early 1984. This car was in the batch of the last 12 cars that were auctioned off, now using modern production parts (the car is a mix of early and late DMC parts).
So this car was there at the very start, and at the very end. And that's quite cool.